CN100526952C - LED backlight unit - Google Patents
LED backlight unit Download PDFInfo
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- CN100526952C CN100526952C CNB2007100789008A CN200710078900A CN100526952C CN 100526952 C CN100526952 C CN 100526952C CN B2007100789008 A CNB2007100789008 A CN B2007100789008A CN 200710078900 A CN200710078900 A CN 200710078900A CN 100526952 C CN100526952 C CN 100526952C
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- light source
- substrate
- guide plate
- light guide
- described light
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- 239000000853 adhesive Substances 0.000 abstract 2
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- 229920001187 thermosetting polymer Polymers 0.000 abstract 2
- 238000009792 diffusion process Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 3
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- 239000007767 bonding agent Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical class OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- -1 acryl Chemical group 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
- G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0091—Positioning aspects of the light source relative to the light guide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0085—Means for removing heat created by the light source from the package
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
An LED backlight unit which can be assembled without a thermosetting adhesive, improved in heat radiation effects to maintain high brightness, and also significantly improved in productivity. A light source has a substrate and a plurality of light emitting diodes disposed on the substrate. A light guide plate is placed adjacent to the light source. A chassis fixes the light source and the light guide plate therein. Fixing means, projections, provided on a side of the light guide plate engagingly fit into holes in the light source substrate and holes in the chassis. Here, the substrate of the light source is fixed in surface contact with the chassis. The light guide plate assembled without a thermosetting adhesive facilitates assembling and ensures effective radiation of heat generated from the LEDs, thereby maintaining high brightness and achieving superb light emitting capability.
Description
The application requires the rights and interests at the 2006-16702 korean patent application of Korea S Department of Intellectual Property submission on February 21st, 2006, and it openly is contained in this by reference.
Technical field
The present invention relates to a kind of back light unit that uses light emitting diode, more particularly, relate to a kind of like this light emitting diode (LED) back light unit, in this LED backlight unit, do not need to assemble light guide plate with the resinoid that influences LED brightness, guaranteed like this from the higher radiation efficiency of the heat of LED generation, thereby kept high brightness, and significantly improved throughput rate.
Background technology
The development that the development of electronic device industry has also caused the development of the various miniscope spares that energy consumption speed is littler and used image device, computing machine and the telecommunication terminal of such display device.Conform to this trend and LCD (LCD) occurred, LCD receives much concern as being used for the display device of monitor and mobile telecommunication terminal.
Therefore usually, LCD can not be spontaneously luminous, must need to comprise the back light unit of the light source that is used to produce light and the light guide plate on the LCD panel rear side.
Back light unit produces white light, makes the LCD panel produce image with (ture-to-life) true to nature look almost.
Fig. 1 shows the traditional back light unit 100 that uses light emitting diode (LED).Be used in light emitting diode (LED) in traditional back light unit 100 owing to luminous (electroluminescence) that take place produces light when voltage is applied to semiconductor.
The size of LED is less than traditional light source, and its serviceable life is longer than traditional light source.In addition, owing to directly electric energy is converted into luminous energy as the LED of light source, so it demonstrates high energy efficiency and low driving voltage.
Therefore, in the back light unit 100 with these advantages, as shown in Figure 1, light source 120, light guide plate 130, a plurality of diffusion disk 140 and a plurality of prismatic lens 150 are arranged on substrate 110 inside, and are fixed by middle substrate 160 and framed 162.
Flat panel type in the mode identical with the mode of light guide plate 130 is constructed diffusion disk 140, and diffusion disk 140 is arranged on the light guide plate 130.Diffusion disk 140 is used for diffusion equably and passes the light that light guide plate 130 is propagated.
In addition, be arranged on the presumptive area (image forming area) that prismatic lens 150 on the diffusion disk 140 will guide to the LCD panel (not shown) that is arranged in prismatic lens 150 tops from the light of diffusion disk 140.
Simultaneously, as mentioned above, as shown in Figures 2 and 3, its substrate 122 that is provided with a plurality of LED 124 is secured on the infrabasal plate 110 by resinoid 112.
That is, in traditional back light unit 100, light source 120 is secured on the infrabasal plate 110 by resinoid 112, thereby places regularly with respect to light guide plate 130.
In addition, impact the LED 124 of light sources 120 in order to prevent light guide plate 130, annex 114 is arranged on the both sides in interior week of infrabasal plate 110, thereby prevents that light guide plate 130 is pushed to LED 124.
In turn, to external radiation, pass light guide plate 130, pass diffusion disk 140 and prismatic lens 150 subsequently from the light of LED 124 emission of light source 120.
Yet in traditional back light unit 100, just the LED 124 of light source 120 just begins radiation heat when luminous, has therefore reduced the brightness of LED 124 widely.Therefore, if LED 124 radiation heat successfully after beginning is luminous, then it little by little reduces brightness, thereby can not reach the high brightness of expectation.
In order to ensure such thermal radiation effect, LED is arranged in the substrate 122, with effectively to outside radiation heat.Yet resinoid 112 (substrate 122 is fastened to infrabasal plate 110 by it) greatly reduces thermal radiation effect.
And if the substrate bending, then it can not separate with light guide plate 130 fully at sweep, thereby can not reach the high brightness of expectation.
In addition, in assembling technology procedure, resinoid 112 should be applied on the rear side of substrate 122.Here, if apply resinoid with unsuitable amount, then resinoid can be painted on the LED 124, and the result has been covered the light from LED 124.
In addition, by very complicated and tediously long technology resinoid 112 is coated in the substrate 122, thereby has influenced throughput rate unfriendly.
Summary of the invention
The present invention is devoted to solve the problem of the front of prior art, so an aspect of of the present present invention is to provide a kind of LED-backlit unit, in this LED-backlit unit, does not need resinoid to assemble light guide plate, thereby has improved throughput rate significantly.
Another aspect of the present invention is to provide a kind of LED-backlit unit with higher luminescence efficiency, and wherein, the heat that produces from LED is radiated outside effectively, to keep the high brightness of expectation.
According to an aspect of the present invention, this LED-backlit unit comprises: light source has substrate and is arranged on suprabasil a plurality of light emitting diode; Light guide plate is provided with light source contiguously; Substrate is used for light source and light guide plate are fixed on substrate; Stationary installation, be used for a side engagement of light guide plate be installed to light source and substrate, wherein, the substrate of light source contacts with substrate formation face regularly.
Preferably, stationary installation comprises: a plurality of projectioies, protrude from light guide plate; A plurality of holes penetrate light source and substrate respectively, corresponding to projection.
Preferably, each projection comprises: the vertical bar part is inserted in each in the hole of light source and substrate; Body portion has the width greater than the width of vertical bar part.
Preferably, form projection by this way, that is, adjacent body portion limits depression, and the size of described depression is constructed to hold each light emitting diode of light source.
Preferably, the length of light guide plate is greater than the interior length of the substrate that is used for fixing light source and light guide plate.
Preferably, be used for fixing light source and light guide plate substrate interior length corresponding to from the rear end of light guide plate to the thickness sum of the substrate of the length of body portion and light source.
Preferably, the width of the vertical bar of projection part is less than the diameter in the hole of light source and substrate.
Preferably, Tu Qi depression has a kind of shape of selecting from the group of being made up of trapezoidal, square and arc.
Description of drawings
From following detailed in conjunction with the accompanying drawings, above and other purpose of the present invention, feature and other advantage will be expressly understood more, in the accompanying drawings:
Fig. 1 is the decomposition diagram that traditional LED-backlit unit is shown;
Fig. 2 illustrates light source invests the traditional LED-backlit unit on the substrate by resinoid planimetric map;
Fig. 3 is the longitudinal sectional view that traditional LED-backlit unit is shown;
Fig. 4 is the longitudinal sectional view that illustrates according to LED-backlit of the present invention unit;
Fig. 5 is the wiring layout of disassembling that the LED-backlit unit that combines according to light source of the present invention and light guide plate is shown;
Fig. 6 is the cut-open view that the LED-backlit unit that light source, light guide plate and substrate junction lump together is shown.
Embodiment
Describe exemplary embodiment of the present invention in detail now with reference to accompanying drawing.
As shown in Figure 4, comprise according to light emitting diode of the present invention (LED) back light unit 1: light source 20 has substrate 22 and a plurality of LED 24 that are arranged in the substrate 22; Light guide plate 30 is placed with light source 20 contiguously.
In addition, LED-backlit unit 1 comprises infrabasal plate 10, a plurality of diffusing panel 40, a plurality of prism plate 50 and middle substrate 60.Infrabasal plate 10 is fixed on light source 20 and light guide plate 30 in the infrabasal plate 10.Diffusing panel 40 is arranged on the top of light guide plate 30, and prism plate 50 is arranged on the top of diffusing panel 40.Substrate 60 in the location, make its fixedly infrabasal plate 10, diffusing panel 40 and prism plate 50.
In addition, according to the present invention, stationary installation 70 be set to a side engagement of light guide plate 30 be installed in light source 20 and the infrabasal plate 10.Therefore, with the substrate 22 of fixed light source 20 contiguously of infrabasal plate 10 faces.
As shown in Figure 5, stationary installation 70 comprises: a plurality of protruding 72, protrude from a described side of light guide plate 30; A plurality of hole 22a and 17a penetrate light source 20 and infrabasal plate 10 respectively, corresponding to projection 72.
This structure allows the projection 72 of light guide plate 30 can be inserted into respectively among the hole 17a of the hole 22a of light source 20 and infrabasal plate 10.
In addition, projection each in 72 comprises: vertical bar part 72a is inserted in each among the hole 17a of the hole 22a of light source 20 and infrabasal plate 10; Body portion 72b has the width greater than the width of vertical bar part 72a.
As shown in Figure 6, body portion 72b makes the vertical bar part 72a have only projection 72 be inserted among the hole 17a of the hole 22a of light source 20 and infrabasal plate 10 each, thereby leaves depression 36 between the substrate 22 of light guide plate 30 and light source 20.
Limit depression 36 by adjacent body portion 72b, the size that depression 36 is set is to hold each LED 24 of light source 20.Therefore, each LED 24 of light source 20 is contained in the depression 36.
Here, the depression 36 of the projection 72 of light guide plate 30 has a kind of shape of selecting from the group of being made up of trapezoidal, square and arc, and each LED24 can be stably laid in space or zone that described shape limits.
Therefore, have only, can prevent that just the LED 24 in the depression 36 are subjected to the damage of light guide plate 30 when the width of body portion 72b during greater than the diameter of the hole 17a of the hole 22a of substrate 22 and infrabasal plate 10.This guarantees that depression 36 is located reliably.
In addition, according to the present invention, the length 1 of light guide plate 30 is greater than the interior long W of the infrabasal plate 10 that is used for fixing light source 20 and light guide plate 30.
As shown in Figure 4, infrabasal plate 10 is respectively arranged with front flange 17 and back flange 19 in its both sides.The rear end of light guide plate 30 is supported by back flange 19, and the substrate 22 of light source 20 is supported by front flange 17.
In this structure, the length 1 of light guide plate 30 is greater than the interior long W of the infrabasal plate 10 that is used for fixing light source 20 and light guide plate 30, that is, and and greater than the interior long W between front flange 17 and the back flange 19.This makes light guide plate 30 to be installed in the infrabasal plate 10 with engaging.
In addition, be used for fixing light source 20 and light guide plate 30 infrabasal plate 10 interior long W can corresponding to from the rear end of light guide plate 30 to the thickness sum of the substrate 22 of the length of body portion 72b and light source 20.
Because this structure, the vertical bar part 72a of the projection 72 of light guide plate 30 is inserted among the hole 17a of front flange 17 of the hole 22a of substrate 22 of light source 20 and infrabasal plate 10.
As a result, according to the present invention, the substrate 22 of light source 20 is secured to infrabasal plate 10, and does not need resinoid 112.This assembly structure makes the rear end of substrate 22 contact with infrabasal plate 10 direct faces, thereby has guaranteed good pyroconductivity and thermal radiation effect.
In addition, though substrate 22 in its middle part slight bending, its sweep also can be proofreaied and correct by light guide plate 30 in assembling technology procedure, and substrate 22 keeps being installed to infrabasal plate 10.
According to the present invention, preferably, form the projection 72 on the light guide plate 30 by this way, that is, the width of projection 72 vertical bar part 72a is less than the diameter of the hole 17a of the hole 22a of light source 20 and infrabasal plate 10.This structure is easy to make the projection 72 of light guide plate 30 to be inserted among each hole 22a of light source 20 and among each hole 17a of infrabasal plate 10.
As shown in Figure 5, according to foregoing LED-backlit of the present invention unit 1 needs resinoid 112 not in assembling technology procedure.
That is, light source 20 is settled with the front flange 17 of infrabasal plate 10 contiguously, and the hole 22a of the substrate 22 of light source 20 aims at the hole 17a of infrabasal plate 10.Subsequently, the projection 72 of light guide plate 30 is respectively inserted among hole 22a and the 17a.
Here, be used for fixing light source 20 and light guide plate 30 infrabasal plate 10 interior long W corresponding to from the rear end of light guide plate 30 to the thickness sum of the substrate 22 of the length of body portion 72b and light source 20.Therefore, the rear end of light guide plate 30 is supported by the back flange 19 of infrabasal plate 10, and the substrate 22 of light source 20 is supported by front flange 17.
Be slightly less than from the rear end of light guide plate 30 to the thickness sum of the substrate 22 of the length of body portion 72b and light source 20 even be used for fixing the interior long W of the infrabasal plate 10 of light source 20 and light guide plate 30, the front flange 17 of infrabasal plate 10 and back flange 19 be flexibly supporting light sources 20 and light guide plate 30 also.
In this structure, width can not be inserted among the hole 22a of substrate 22 greater than the body portion 72b of the light guide plate 30 of the diameter of the hole 22a of substrate 22, but is pushing away substrate 22, makes its front flange 17 against infrabasal plate 10.That is, even the substrate 22 of light source 20 has a point deformation, it still is pushed the front flange 17 against infrabasal plate 10, contacts thereby the rear side of substrate 22 forms smooth face with front flange.
Therefore, owing to substrate 22 contacts with 10 of the infrabasal plates of being made by metal material, so the heat that produces in the course of work of light source 20 is radiated outside by infrabasal plate 10 without difficulty from substrate 22.This has also guaranteed extraordinary thermal radiation effect.
In the course of work of light source 20, these good thermal radiation effects prevent that the LED 24 of light source 20 from producing the heat that can reduce brightness on the contrary.Therefore, this has guaranteed high brightness, and does not hinder the performance of light source 20.
After being arranged on light source 20 and light guide plate 30 on the infrabasal plate 10, diffusing panel 40 is set at the top of light guide plate 30, and prism plate 50 is set at the top of diffusing panel 40.Here, fix infrabasal plate 10, diffusing panel 40 and prism plate 50 by middle substrate 60.
In aforesaid this assembly technology, the present invention does not adopt heat fixation bonding agent 112, thereby can not cause any problem of smearing of bonding agent 112 on LED 24.This has got rid of the generation of defective among the LED.In addition, the present invention assembles by installing, thereby helps assembly technology, and has improved throughput rate significantly.
Simultaneously, according to the present invention, the depression 36 of the projection 72 of light guide plate 30 has a kind of shape of selecting from the group of being made up of trapezoidal, square and arc, and each LED 24 of light source 20 can be stably laid in space that described shape limits or zone.
Can construct the shape of depression 36 with the shape of any necessity, thereby obtain the expectation brightness of LED-backlit of the present invention unit 1.Therefore, depression of the present invention is not limited to given shape.
In addition, owing to be formed on projection 72 on the light guide plate 30, so the present invention has got rid of the demand to traditional annex (that is, be used to independent annex 114 that light guide plate 30 is separated with the LED 24 of light source).Therefore, this has simplified the structure of infrabasal plate 10.
As mentioned above, according to exemplary embodiment of the present invention, need not use resinoid to assemble light guide plate, thereby help assembly technology and throughput rate.
In addition, according to the present invention, the substrate of light source contacts with the direct face of substrate, thereby has removed any obstacle on the heat transfer path.As a result, this feasible heat that produces from LED is effectively to external radiation, thus maintenance high brightness and good luminous power.
Though illustrated and described the present invention in conjunction with the preferred embodiments, it is apparent to those skilled in the art that under the situation that does not break away from the spirit and scope of the present invention that limit as claim, can modify and change.
Claims (7)
1, a kind of LED backlight unit comprises:
Light source has substrate and is arranged on described suprabasil a plurality of light emitting diodes;
Light guide plate is provided with described light source contiguously;
Substrate is used for described light source and described light guide plate are fixed on described substrate;
Stationary installation, be used for a side engagement of described light guide plate be installed to the described substrate and the described substrate of described light source, described stationary installation comprises a plurality of projectioies and a plurality of hole, described a plurality of projection is protruded to described light source from described light guide plate, and described a plurality of holes penetrate the described substrate of described light source and described substrate respectively and corresponding to described projection;
Wherein, the described substrate of described light source is arranged between described light guide plate and the described substrate,
When the described projection with described light guide plate is inserted into respectively in the described hole of described substrate and described substrate, thereby when being installed in the described substrate described light guide plate, the described substrate of described light source is secured to described substrate and contacts with described substrate formation face regularly with engaging.
2, LED backlight unit according to claim 1, wherein, each described projection comprises:
The vertical bar part is inserted in each of described a plurality of holes of described light source and described substrate;
Body portion has the width greater than the width of described vertical bar part.
3, LED backlight unit according to claim 2 wherein, forms described projection by this way, that is, adjacent body portion limits depression, and the size of described depression is constructed to hold each described light emitting diode of described light source.
4, LED backlight unit according to claim 1, wherein, the length of described light guide plate is greater than the interior length of the described substrate that is used for fixing described light source and described light guide plate.
5, LED backlight unit according to claim 4, wherein, be used for fixing described light source and described light guide plate described substrate interior length corresponding to from the rear end of described light guide plate to the thickness sum of the described substrate of the length of the front end of described body portion and described light source.
6, LED backlight unit according to claim 2, wherein, the width of the described vertical bar part of described projection is less than the diameter in the described hole of described light source and described substrate.
7, according to each the described LED backlight unit in the claim 1,2,3 and 6, wherein, the depression that described projection limits has a kind of shape of selecting from the group of being made up of trapezoidal, square and arc.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060016702A KR100790697B1 (en) | 2006-02-21 | 2006-02-21 | LED Back Light Unit |
| KR1020060016702 | 2006-02-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101025511A CN101025511A (en) | 2007-08-29 |
| CN100526952C true CN100526952C (en) | 2009-08-12 |
Family
ID=37899100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100789008A Active CN100526952C (en) | 2006-02-21 | 2007-02-25 | LED backlight unit |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7784989B2 (en) |
| JP (1) | JP4503029B2 (en) |
| KR (1) | KR100790697B1 (en) |
| CN (1) | CN100526952C (en) |
| DE (1) | DE102007006303B4 (en) |
| GB (1) | GB2435343B (en) |
| TW (1) | TWI351563B (en) |
Families Citing this family (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4973213B2 (en) | 2007-01-31 | 2012-07-11 | 三菱電機株式会社 | Light source device, planar light source device, and display device |
| US20080232134A1 (en) * | 2007-03-23 | 2008-09-25 | Promate Electronic Co., Ltd. | Replaceable LED light source device used in backlight module |
| JP4520494B2 (en) * | 2007-08-20 | 2010-08-04 | 明拓工業株式会社 | Display device |
| KR101393904B1 (en) * | 2007-11-06 | 2014-05-13 | 엘지이노텍 주식회사 | Light unit |
| KR101389349B1 (en) | 2007-11-23 | 2014-04-28 | 삼성전자주식회사 | Back light unit and liquid crystal display using the same |
| KR20090057573A (en) * | 2007-12-03 | 2009-06-08 | 삼성전자주식회사 | Back light unit and flat panel display apparatus |
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-
2006
- 2006-02-21 KR KR1020060016702A patent/KR100790697B1/en active IP Right Grant
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- 2007-02-12 GB GB0702610A patent/GB2435343B/en active Active
- 2007-02-20 US US11/708,037 patent/US7784989B2/en active Active
- 2007-02-25 CN CNB2007100789008A patent/CN100526952C/en active Active
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| KR20070084641A (en) | 2007-08-27 |
| KR100790697B1 (en) | 2008-01-02 |
| GB2435343B (en) | 2011-02-23 |
| US7784989B2 (en) | 2010-08-31 |
| TWI351563B (en) | 2011-11-01 |
| TW200736759A (en) | 2007-10-01 |
| CN101025511A (en) | 2007-08-29 |
| JP4503029B2 (en) | 2010-07-14 |
| DE102007006303A1 (en) | 2007-09-13 |
| US20070195551A1 (en) | 2007-08-23 |
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